Figure 1 | Scientific Reports

Figure 1

From: A comparison of soil texture measurements using mid-infrared spectroscopy (MIRS) and laser diffraction analysis (LDA) in diverse soils

Figure 1Figure 1

Measured (sieve-pipette) and MIRS and LDA predicted clay and sand in (a) the European whole calibration set (n = 75), European validation sub-set with < 5% OC (n = 21), European validation sub-set with > 5% OC (n = 13), Broadbalk independent validation set (n = 46, note sand & silt) and the UK independent validation set (n = 25) and (b) the Kenyan calibration set (n = 16) and the Kenya farm independent validation set (n = 30). Showing the R2, intercept, RMSE, RPD (standard deviation of observed values/RMSE of predicted values), and number of MIRS model components. Dashed line is the 1:1 line. Cal. = calibration, val. = validation. Note, LDA clay threshold < 8 µm.

Back to article page